Wow, yeah, that is ALOT of oxy there, my friend. The thing is this: sleeping agents aggravate aspects of dp. It's not the end of the world, and I totally understand needing the sleep to cope with the intensity during the week, etc. It's only that the sudden "oh, my God, the world just shifted" feelings of instant derealization or dp can be encouraged by reactions to sleeping pills.
Anything that enhances altered states of consciousness (pushing the person INTO one state such as sleeping from waking) is going to "loosen" the doorway to dp states as well. I dont' think it's any permanent effect, but the reason I caution against them is that for someone who is mostly doing well, but still has bouts of sudden onset feelings of unreality throughout the day - sleeping pills are probably the culprit. But you'll take it as long as you need to, and may notice once you quit that some of the dp goes away, too.
Peace,
sweet dreams,
Janine
p.s. If I was in "group" four days a week, I might need a pill to sleep, too. lol